Hi It could be 10 pounds of stuff and 340 pounds of shielding …
It also could be 10 pounds of WAAS and 340 pounds of something they don't want to talk about. Bob On Jul 11, 2013, at 3:17 PM, David J Taylor <[email protected]> wrote: > If you look at the pictures here > > http://www.orbital.com/NewsInfo/Publications/Galaxy_Fact.pdf > > the satellite on the right has things sticking out the bottom, in the > back corner, that are missing on the others and that look a lot like > the antennas on GPS satellites. The WAAS satellite is also 350 pounds > heavier than the other two even though the C-band payload is identical > on all three, so it seems like there could be a fair amount of extra > stuff added for WAAS support. > > Dennis Ferguson > _______________________________________________ > > Thanks, Dennis. The antennas don't surprise me, as they would need to > produce a near-whole-disk coverage at a similar ground received power level > to the GPS satellites. That extra weight /does/ sound a lot if it were > "just" a simple transponder for earth produced information. Here in Europe > was have three EGNOS sources (all on other satellites, I believe), and I > don't believe they play any part in actual position fixing, but they do > provide extra information enabling the fix to be refined. > > Cheers, > David > -- > SatSignal Software - Quality software written to your requirements > Web: http://www.satsignal.eu > Email: [email protected] > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
